CN215726234U - Detection device and steam box - Google Patents
Detection device and steam box Download PDFInfo
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- CN215726234U CN215726234U CN202121769037.2U CN202121769037U CN215726234U CN 215726234 U CN215726234 U CN 215726234U CN 202121769037 U CN202121769037 U CN 202121769037U CN 215726234 U CN215726234 U CN 215726234U
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Abstract
The utility model discloses a detection device and a steam box, wherein the detection device comprises a sensing device and a controller, wherein the sensing device comprises a capacitive sensing IC and a sensing Pad; the induction Pad is electrically connected with the capacitive induction IC; the capacitance type induction IC is electrically connected with the controller; the induction Pad is arranged on the outer side wall of the device to be tested and at a position corresponding to a preset liquid level line; the capacitive sensing IC is used for acquiring a sensing capacitance value through sensing the Pad; the capacitive sensing IC is also used for generating a level signal according to the sensing capacitance value and sending the level signal to the controller; the controller is used for determining that the liquid level of the liquid to be detected in the equipment to be detected is consistent with the position corresponding to the preset liquid level line when the level signal is switched from the first level to the second level. The capacitance type isolation sensing technology used by the sensing device in the detection device is safe, stable and reliable, is not influenced by mechanical stress such as vibration and the like, has long service life, and realizes intelligent control of the detection device.
Description
Technical Field
The utility model relates to the field of kitchen appliances, in particular to a detection device and a steam box.
Background
Among the current kitchen appliance, to having the device of predetermineeing the liquid level line, like steam ager, water tank, kettle etc. its operation in-process needs heat liquid, in the in-service use in-process, needs detect the liquid level that holds in the liquid device (hereinafter for short the equipment that awaits measuring) to ensure the normal operating and the security of product. The existing detection technology is mainly used for identifying and judging the liquid level of liquid by installing a reed switch as a detection sensor, then conveying a signal detected by the reed switch to a controller, and judging whether a liquid level line of the liquid in equipment to be detected is within a range of a preset scale mark or not by a main control module designed on the controller according to the signal, so that the safe operation of the equipment to be detected is guaranteed.
Adopt the liquid level position of liquid in the test set to await measuring of detecting element test tongue tube, following shortcoming has:
1) the reed pipe belongs to a mechanical structure device, and a metal contact inside the device is small and easy to damage by the influence of vibration of a product or the device;
2) the packaging structure of the reed switch is generally glass packaging, and is easy to break and damage due to stress extrusion;
3) when the contact of the reed switch is overlapped with the position of the magnet, the magnet generates different polarities and magnetic forces at the position of the contact of the reed switch, and the contact is connected to form a circuit path. Generally, a reed switch detection assembly is designed and fixed at a certain position, so that the position of a magnet must change along with the position of a liquid level, namely the position of the magnet moves along with the difference of the liquid level, in the practical application design, 2 parts of a magnet floater are additionally designed in the to-be-tested equipment, one part is used for testing whether the to-be-tested equipment exists, the other part is used for testing the liquid level position of the liquid in the to-be-tested equipment, because the magnet floater is easily influenced by the surface tension of the liquid, the movement is blocked, the dislocation fault occurs, the liquid level position of the to-be-tested equipment and the liquid in the to-be-tested equipment cannot be tested, and the device fails and cannot be used;
4) the equipment to be tested is provided with a magnet floater, and the structural design is complex;
5) when the liquid level position of the equipment to be detected and liquid in the equipment to be detected needs to be judged, 2 magnet floaters and 2 reed pipes are needed in practical application, and the material cost is high.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is to overcome the defects that when the liquid level position of liquid in equipment to be detected and equipment to be detected is detected based on a 'reed switch' matched 'magnet floater' in the prior art, the contact of metal contacts in the reed switch is unreliable and the reed switch is easily damaged by the influence of the vibration of a product or a device; the reed switch detection assembly is designed to be a fixed position, and the position of the magnetic floater is required to move along with different liquid levels; the magnetic floater is easily influenced by the surface tension of liquid, has blocked movement and misplacement and has a complex structure; the problem that the cost of the configuration materials of the reed switch and the magnet floater is high is solved, the reed switch device and the magnet floater in the water tank can be eliminated, and the technology for detecting the liquid levels of the liquid in the equipment to be detected and the equipment to be detected by using the sensing device comprising a capacitive sensing IC (Integrated Circuit) and a sensing Pad is provided.
The utility model solves the technical problems through the following technical scheme:
in a first aspect, a detection device is provided, which comprises a sensing device and a controller,
the sensing device comprises a capacitive sensing IC and a sensing Pad;
the induction Pad is electrically connected with the capacitive induction IC;
the capacitive sensing IC is electrically connected with the controller;
the induction Pad is arranged on the outer side wall of the device to be tested and at a position corresponding to a preset liquid level line;
the capacitive sensing IC is used for acquiring a sensing capacitance value through the sensing Pad;
the capacitive sensing IC is further used for generating a level signal according to the sensing capacitance value and sending the level signal to the controller;
the controller is used for determining that the liquid level of the liquid to be detected in the equipment to be detected is consistent with the position corresponding to the preset liquid level line when the level signal is switched from the first level to the second level.
Preferably, the controller is further configured to determine that the liquid level of the liquid to be measured in the device to be measured does not correspond to the position corresponding to the preset liquid level line when the level signal is switched from the second level to the first level.
Preferably, the induction Pad is detachably arranged on the outer side wall and is abutted against the outer side wall.
Preferably, the detection device further comprises a support frame, and the support frame is fixedly arranged on the outer side wall of the device to be detected;
the device to be tested is placed on the support frame;
the support frame is made of non-conductive materials.
Preferably, the distance between the induction Pad and the inner side wall of the device under test is not greater than 10 mm.
Preferably, the inductive Pad includes a planar conductor;
and/or the induction Pad material comprises copper.
Preferably, the shape of the induction Pad comprises a circle with a diameter greater than 10 mm;
alternatively, the shape of the inductive Pad includes a square having a length and/or width greater than 10 mm.
Preferably, the sensing Pad is disposed on a front surface of the sensing device, and the capacitive sensing IC and the controller are disposed on a back surface of the sensing device.
Preferably, the sensing device is provided with a connecting hole, and the capacitive sensing IC is electrically connected with the controller and the sensing Pad through the connecting hole.
In a second aspect, a steam box is provided, the steam box includes a water tank and any one of the above detection devices, and the sensing Pad is disposed on a position on an outer side wall of the water tank, which corresponds to a preset liquid level line.
The positive progress effects of the utility model are as follows:
according to the technical scheme, a reed pipe device and a water tank magnet floater are removed, the area of the detection device is reduced, and the material cost is low; the liquid level position of the equipment to be tested and the liquid in the equipment to be tested can be identified and judged only by 1 path of signal, and the structural design is simple; the installation position of a detection device in the equipment to be detected is flexible and cannot be influenced by a structure 'magnet floater'; the capacitance type isolation sensing technology used by the sensing device in the detection device is safe, stable and reliable, is not influenced by mechanical stress such as vibration and the like, has long service life and realizes intelligent control of the detection device.
Drawings
FIG. 1 is a schematic block diagram of a detecting apparatus according to embodiment 1 of the present invention;
FIG. 2 is a schematic structural view of an arrangement of a detecting unit according to embodiment 1 of the present invention;
fig. 3 is a schematic circuit diagram of a capacitive sensing IC in the detection apparatus according to embodiment 1 of the present invention;
fig. 4 is a schematic block diagram of a sensing device in the detection device according to embodiment 1 of the present invention.
Detailed Description
The utility model is further illustrated by the following examples, which are not intended to limit the scope of the utility model.
The utility model is based on the principle of capacitance isolation type induction, the induction capacitor can induce the change of the capacitance through any non-conductive isolation medium, such as glass, plastic and the like, that is, the capacity of the capacitor is not influenced by the material of the glass, the plastic and the like, when the size of the capacitor is changed through a conductive medium, such as water and the like, the electric quantity or the electric charge stored by the capacitor is also changed. Whether the equipment to be tested is installed or not and the liquid level position of liquid in the equipment to be tested can be identified by testing the quantity of the capacitor charges, so that the liquid capacity is identified, and intelligent control of products containing the equipment to be tested, liquid level prompt of the equipment to be tested or the liquid in the equipment to be tested and the like are realized.
Description of the principles of the utility model:
based on a two-channel comparison principle, a first channel detects an environment capacitor in a liquid-free state, the environment capacitor is connected with a fixed capacitor, the environment without liquid is simulated, and a current value is recorded as a comparison reference; the second channel detects the change condition of liquid in the equipment to be detected through a sensor detection electrode in the induction Pad to obtain the capacitance value under the current state, and the difference value of the two channel capacitors and a voltage comparison threshold value preset in the chip are sent into the comparator to be compared, so that the change of the liquid level in the equipment to be detected or the existence of liquid is judged.
Example 1
The present embodiment provides a detection apparatus, fig. 1 is a schematic block diagram of the detection apparatus shown in embodiment 1 of the present invention, the detection apparatus 1 includes a sensing device and a controller 4, the sensing device includes a capacitive sensing IC2 and a sensing Pad (referred to as a sensing surface or a sensing disk) 3;
the inductive Pad3 is electrically connected with the capacitive inductive IC 2;
the capacitive sensing IC2 is electrically connected to the controller 4.
Fig. 2 is a schematic structural diagram of an arrangement of a detection apparatus shown in embodiment 1 of the present invention, wherein an induction Pad3 in the detection apparatus 1 is arranged on an outer side wall of a device under test 5 at a position corresponding to a preset liquid level line 6.
The capacitive sensing IC2 is used for acquiring a sensing capacitance value through the sensing Pad 3;
the capacitive sensing IC2 is further configured to generate a level signal according to the sensing capacitance value and send the level signal to the controller 4;
the controller 4 is configured to determine that the liquid level of the liquid to be detected in the device to be detected 5 coincides with the position corresponding to the preset liquid level line 6 when the level signal is switched from the first level to the second level;
the controller 4 is further configured to determine that the liquid level of the liquid to be measured in the device to be measured 5 does not correspond to the position corresponding to the preset liquid level line 6 when the level signal is switched from the second level to the first level.
The device to be tested in this embodiment may be a water tank, the sensing Pad3 in the detection apparatus 1 is electrically connected to the capacitive sensing IC2, the capacitive sensing IC2 is electrically connected to the controller 4, and the sensing Pad3 is disposed on the outer side wall of the water tank at a position corresponding to a preset water level line; the capacitive sensing IC2 is used for acquiring a sensing capacitance value by sensing the change of the dielectric constant value of the Pad 3; generating a level signal according to the induction capacitance value and sending the level signal to the controller 4; when the level signal is switched from high level to low level, the controller 4 turns over the level and determines that the water level in the water tank is consistent with the position corresponding to the preset water level line; when the level signal is switched from low level to high level by the controller 4, the level is turned over, and it is determined that the water level in the water tank does not conform to the preset water level line and the water amount is insufficient.
In this embodiment, the preset water level line 6 is the lowest water level line, and the preset water level line 6 in this embodiment may be set as needed, and may be the highest water level line or the lowest water level line.
The specific working process of the water tank detection device 1 in the embodiment is as follows:
when the water tank is filled with water (the water level exceeds the set position of the induction Pad 3), the water is a conductive medium, the dielectric constant on the induction Pad3 is changed, the value of the induction capacitance is also changed, the change of the induction capacitance indicates that an electric signal on the capacitance is also changed, the changed electric signal is compared and calculated in the IC through the capacitance type induction IC2, the original high level is changed into the low level through output, the level is turned over, and the indication that the water in the water tank is above the water level line and the output water quantity is sufficient is provided.
When the water tank has no water or insufficient water (the water level does not exceed the set position of the sensing Pad 3), and the water level is below the preset water level line, because no water exists, the dielectric constant of the sensing Pad3 recovers to the original value, the capacitive sensing IC2 resets and changes from low level to high level, a signal is also turned over to indicate that no water or insufficient water exists in the water tank, and meanwhile, the signal is transmitted to the controller 4 for further processing, and a fault prompt of no water or insufficient water is output.
In this embodiment, the level signal received by the controller 4 is switched from a low level to a high level to indicate that the water level meets the preset water level line 6; the level signal received by the controller 4 is switched from high level to low level to indicate that the water level does not meet the preset water level line 6. The level signal in this embodiment may be set as required, and switching from the high level to the low level indicates that the water level meets the preset water level line 6, or switching from the low level to the high level indicates that the water level meets the preset water level line 6.
The detection device 1 in the embodiment ensures that the equipment to be detected 5 has enough liquid, and prevents the equipment to be detected 5 from generating product faults or potential safety hazards due to insufficient liquid; the capacitance type isolation sensing technology used by the equipment to be detected 5 is safe, stable and reliable, is not influenced by mechanical stress such as vibration and the like, has long service life, and realizes intelligent control of the detection device 1.
Fig. 3 is a schematic circuit diagram of a capacitive sensing IC in the detection apparatus shown in embodiment 1 of the present invention, wherein:
the COMD pin of capacitive sense IC2 is the port for the charge collection capacitor, forming the reference charge value.
The CDC pin of the capacitance type sensing IC2 and the sensitivity interface port select a proper capacitance value according to the use environment, so that the sensitivity of the test is adjusted.
Pin CIN1 of the capacitive sensing IC2 is an input port of the sensing Pad3 and is connected with a capacitor and a resistor device.
A pin CIN2 of the capacitive sensing IC2 is the other input port of the sensing Pad3, and is connected with the sensing Pad3 to detect the liquid level of the liquid in the device to be detected.
The MD pin of capacitive sense IC2 is the operating mode setting port for selecting the detection mode.
The capacitive sensing IC2 obtains a sensing capacitance value through the sensing Pad3, compares and calculates the internal part of the IC, generates a level signal according to the sensing capacitance value and sends the level signal to the controller 4.
In this embodiment, the sensing Pad3 is detachably disposed on the outer sidewall of the water tank and abuts against the outer sidewall of the water tank.
The sensing Pad3 is detachably arranged on the outer side wall of the water tank, that is, the sensing Pad3 can be used as a separable part to abut against the outer side wall of the water tank, that is, the sensing Pad3 is tightly attached to the outer side wall of the water tank to make actual surface contact, as long as the sensing Pad3 is ensured to be arranged on the outer side wall of the water tank at a position corresponding to a preset water level line, wherein the preset water level line is only a height value and can include a range contained in the whole plane with the preset water level line as a separation surface.
In this embodiment, the water tank still includes the support frame, and the support frame is fixed to be set up on the lateral wall of water tank, and the water tank is installed on the support frame, and response Pad3 is installed on the support frame that the water tank awaits measuring the water level position, and the support frame in this embodiment includes non-conductive material, like glass, plastics etc.
The capacity of the capacitor is not affected by the materials such as glass and plastic, and when the capacitor passes through a conductive medium such as water, the capacity of the capacitor changes, and the amount of electricity or charge stored in the capacitor changes. The water level position in the water tank can be identified by testing the quantity of the electric charges of the capacitor, so that the water quantity is identified.
In this embodiment, the detection device 1 composed of the sensing Pad3 is installed on the support frame of the position of the water level to be detected of the water tank, and the distance between the sensing Pad3 and the inner side wall of the water tank is not more than 10 mm.
The distance is the distance between the sensing Pad3 and the inner side wall of the water tank, if the sensing Pad3 cannot be tightly attached to the outer side wall of the water tank due to the limitation of the structure, in use, the water tank can be identified whether water exists or not by adjusting the parameters of circuit design, but the distance between the sensing Pad and the water tank must be ensured within 10mm, otherwise, the sensing Pad3 cannot identify water level change and cannot perform testing.
In this embodiment, the distance between response Pad3 and the water tank inside wall is not more than 10mm, has guaranteed that even detection device 1 of different circuit design, equally can realize the detection to the water level that awaits measuring in the water tank for detection device 1 mounted position of water tank is more nimble, makes things convenient for detection device 1's dismantlement and change.
In the present embodiment, the inductive Pad3 includes a planar conductor; the material of the inductive Pad3 includes, but is not limited to, copper, and may be a metal sheet, a flat-top cylindrical spring, conductive cotton, conductive rubber, etc.
In this embodiment, the shape of the inductive Pad3 includes a circular conductor with a diameter greater than 10 mm; or the shape of the sensing Pad3 includes a square sensing device conductor having a length greater than 10 mm; or the sensing Pad3 is in a shape of a square conductor with the width larger than 10mm, and the sensing Pad3 in different shapes can further ensure that the sensing Pad3 has a plane area, so that the water level change can be conveniently detected.
Fig. 4 is a schematic block diagram of a sensing device in the detection apparatus according to embodiment 1 of the present invention, the sensing Pad3 is disposed on a front surface of the sensing device, and the capacitive sensing IC2 and the controller 4 are disposed on a back surface of the sensing device; the sensing device is provided with a connecting hole, and the capacitive sensing IC2 is electrically connected with the controller 4 and the sensing Pad3 through the connecting hole.
In this embodiment, the sensing device is a double-sided structure, and the sensing device includes a PCB (Printed Circuit Board) 7, a sensing Pad3 is disposed on the front side of the PCB7, a capacitive sensing IC2 and a controller 4 are disposed on the back side of the PCB7, a connection hole is disposed on the PCB7, and the capacitive sensing IC2 is electrically connected to the controller 4 and the sensing Pad3 through the connection hole.
The inductive Pad3 arranged on the front surface of the PCB7 can be formed by coating copper material on the front surface of the PCB7 to form the inductive Pad3, or can be formed by directly arranging copper sheets to form the inductive Pad3, and the inductive Pad3 includes but is not limited to copper.
This embodiment adopts two-sided structure, has reduced detection device's area for detection device structure is small and exquisite.
Example 2
This embodiment provides a steam box, and steam box includes water tank and detection device as described in embodiment 1, and detection device includes capacitive sensing IC, response Pad, controller.
When a water tank in the steam box is filled with water (the water level exceeds the set position of the induction Pad), the water is a conductive medium, the dielectric constant on the induction Pad is changed, the numerical value of the induction capacitor is also changed, the change of the induction capacitor indicates that an electric signal on the capacitor is also changed, the changed electric signal is compared and calculated in an IC through a capacitive induction IC, the original high level is output to be changed into the low level, the level is turned over, the water in the water tank is above the water level line, the water quantity is sufficient, and the controller controls the normal operation of the steam box.
When the water tank in the steam box has no water or insufficient water (the water level does not exceed the position of the set induction Pad), and the water level is below the preset water level line, the dielectric constant of the induction Pad recovers the original value due to the absence of water, the capacitive induction IC resets and changes from low level to high level, and the signal is also turned over to indicate that no water or insufficient water exists in the water tank, and meanwhile, the signal is conveyed to the controller for further processing, and a fault prompt of no water or insufficient water is output, and the controller controls the steam box to stop running to prompt a user to supplement the water in the water tank.
In this embodiment, the steam ager still includes the support frame, and the support frame is the partly of steam ager body, and the support frame is fixed to be set up on the lateral wall of water tank, and the water tank is installed on the support frame, and response Pad is installed on the support frame that the water tank awaits measuring the water level position, and the support frame in this embodiment includes non-conductive material, like glass, plastics etc..
In this embodiment, the water tank is installed on the support frame, and detection device can detect the condition that does not have water or the water level is not enough in the water tank, also can detect the condition that the water tank does not install.
The water tank is not installed, the detection principle is equal to the condition that no water or insufficient water exists in the water tank (the water level does not exceed the position of the set induction Pad), because no water or insufficient water exists, the dielectric constant of the induction Pad recovers the original numerical value, the capacitive induction IC resets, the low level is changed into the high level, the signal is also turned over, the water tank is not installed, meanwhile, the signal is conveyed to the controller for further processing, the fault prompt that the water tank is not installed is output, the controller controls the steam box to stop running, the prompt user to check the water tank until the water tank is installed in the steam box.
In this embodiment, the water tank in the steam box has a preset water level line, and according to the change of the dielectric constant on the sensing Pad, the capacitive sensing IC outputs a corresponding level signal to the controller, and if the controller controls the operation of the steam box according to the received level signal. If the water level of the water tank in the steam box is below the preset water level line, the water amount is insufficient, the controller controls the steam box to stop running, the situation that the steam box is dry-burned without water can not occur in the running process of the steam box, the running safety of the steam box is improved, the capacitive isolation sensing technology used by the sensing device in the detection device is safe, stable and reliable, is not influenced by mechanical stress such as vibration and the like, is long in service life, and realizes the intelligent control of the detection device.
Example 3
The embodiment provides an electric kettle, wherein the kettle is provided with a detection device as described in embodiment 1, and the detection device comprises a capacitive sensing IC, a sensing Pad and a controller.
The induction Pad is electrically connected with the capacitance induction type IC, the capacitance induction type IC is electrically connected with the controller, and the induction Pad is arranged on the outer side wall of the kettle at a position corresponding to a preset water level line; the capacitive sensing IC is used for acquiring a sensing capacitance value by sensing the change of the dielectric constant value of the Pad; generating a level signal according to the induction capacitance value and sending the level signal to a controller; when the level signal is switched from high level to low level, the controller determines that the water level in the water bottle conforms to the position corresponding to the preset water level line.
In this embodiment, the preset water level line is the highest water level line for remind the user that the water yield is too much in the kettle, in order to prevent that the water from overflowing in the use process, resulting in the kettle short circuit, the circuit damages the condition that causes the potential safety hazard.
Technical personnel in the field can set the preset water level line as the lowest water level line according to requirements, so that the condition that the kettle is dried without water in the using process is avoided, and the kettle is damaged or the danger of fire is caused.
While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that this is by way of illustration only, and that the scope of the utility model is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the utility model, and these changes and modifications are within the scope of the utility model.
Claims (10)
1. A detection device, characterized by: the detection device comprises a sensing device and a controller,
the sensing device comprises a capacitive sensing IC and a sensing Pad;
the induction Pad is electrically connected with the capacitive induction IC;
the capacitive sensing IC is electrically connected with the controller;
the induction Pad is arranged on the outer side wall of the device to be tested and at a position corresponding to a preset liquid level line;
the capacitive sensing IC is used for acquiring a sensing capacitance value through the sensing Pad;
the capacitive sensing IC is further used for generating a level signal according to the sensing capacitance value and sending the level signal to the controller;
the controller is used for determining that the liquid level of the liquid to be detected in the equipment to be detected is consistent with the position corresponding to the preset liquid level line when the level signal is switched from the first level to the second level.
2. The detecting device according to claim 1, wherein the controller is further configured to determine that the liquid level of the liquid to be detected in the device under test does not correspond to the position corresponding to the preset liquid level line when the level signal is switched from the second level to the first level.
3. The detecting device according to claim 1, wherein the sensing Pad is detachably disposed on the outer sidewall and abuts against the outer sidewall.
4. The detecting device according to claim 1, further comprising a supporting frame, wherein the supporting frame is fixedly disposed on the outer sidewall of the device under test;
the device to be tested is placed on the support frame;
the support frame is made of non-conductive materials.
5. The inspection apparatus of claim 1, wherein the distance between the inductive Pad and the inner sidewall of the device under test is no greater than 10 mm.
6. The sensing device of claim 1, wherein the inductive Pad includes a planar conductor;
and/or the induction Pad material comprises copper.
7. The detection apparatus as claimed in claim 6, wherein the shape of the sensing Pad includes a circle having a diameter greater than 10 mm;
or the shape of the inductive Pad includes a square having a length and/or width greater than 10 mm.
8. The detecting device according to claim 1, wherein the front surface of the sensing device is provided with the sensing Pad, and the back surface of the sensing device is provided with the capacitive sensing IC and the controller.
9. The detecting device for detecting the rotation of a motor rotor according to claim 8, wherein the sensing device is provided with a connecting hole, and the capacitive sensing IC is electrically connected with the controller and the sensing Pad through the connecting hole.
10. A steam box comprising a water tank, wherein the steam box further comprises a detection device according to any one of claims 1 to 9, and the sensing Pad is disposed on an outer side wall of the water tank at a position corresponding to a preset liquid level line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121769037.2U CN215726234U (en) | 2021-07-30 | 2021-07-30 | Detection device and steam box |
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| CN202121769037.2U CN215726234U (en) | 2021-07-30 | 2021-07-30 | Detection device and steam box |
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| CN215726234U true CN215726234U (en) | 2022-02-01 |
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